| FLFedchem Llc/bethlehem | Bethlehem | PA | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| FCFerro Corporation | King of Prussia | PA | Computer and Electronic Product Manufacturing334419 | — | ◐ LIKELY ACTIVE |
| FGFiber Glass Sys Inc/mt Union Plt | Mount Union | PA | Plastics and Rubber Products Manufacturing326130 | — | ◐ LIKELY ACTIVE |
| FTFinish Thompson Inc | Erie | PA | Machinery Manufacturing333996 | 100-499 | ◐ LIKELY ACTIVE |
| FLFlagzone, LLC. | Gilbertsville | PA | Textile Product Mills314999 | 20-99 | ◐ LIKELY ACTIVE |
| FIFleetwood Industries INC. | Leesport | PA | Primary Metal Manufacturing331491 | — | ◐ LIKELY ACTIVE |
| FAFlexsys Amer LTD Par/monongahela | Monongahela | PA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| FCFmc Corporation | Philadelphia | PA | Chemical Manufacturing325180 | 500+ | ◐ LIKELY ACTIVE |
| FMF & M Hat Co/denver | Denver | PA | Apparel Manufacturing315990 | 20-99 | ◐ LIKELY ACTIVE |
| FIFoerster Instruments Incorporated | Pittsburgh | PA | Computer and Electronic Product Manufacturing334519 | 20-99 | ◐ LIKELY ACTIVE |
Forms + Surfaces 1901 | Glenshaw | PA | Fabricated Metal Product Manufacturing332323 | 100-499 | ◐ LIKELY ACTIVE |
| FUForum US Inc/clearfield Plt | Clearfield | PA | Fabricated Metal Product Manufacturing332420 | — | ◐ LIKELY ACTIVE |
Fox Chase Management, INC | Irwin | PA | Machinery Manufacturing333131 | 20-99 | ◐ LIKELY ACTIVE |
| FMFragrance Manufacturing, INC. | Allentown | PA | Chemical Manufacturing325199 | 100-499 | ◐ LIKELY ACTIVE |
| FSFres-co System USA | Telford | PA | Printing and Related Support Activities323111 | 100-499 | ◐ LIKELY ACTIVE |
| GCGardners Candies | Tyrone | PA | Food Manufacturing311352 | 100-499 | ◐ LIKELY ACTIVE |
| GLGarrett Liners Inc | Fallsington | PA | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| GIGaven Industries INC | Saxonburg | PA | Fabricated Metal Product Manufacturing332311 | 20-99 | ◐ LIKELY ACTIVE |
| GGelest/falls | Morrisville | PA | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| GBGemini Bakery Equipment Company | Philadelphia | PA | Machinery Manufacturing333241 | 20-99 | ◐ LIKELY ACTIVE |
| GDGeneral Dynamics Ots (wilkes-barre), LLC | Wilkes Barre | PA | Fabricated Metal Product Manufacturing332111 | 500+ | ◐ LIKELY ACTIVE |
| GMGeneral Metal CO INC | Bensalem | PA | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| GPGeneral Press Corporation | Natrona Heights | PA | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| GOGentex Optics Inc/simpson Nightvision | Simpson | PA | Textile Mills313320 | — | ◐ LIKELY ACTIVE |
| GPGeorgia Pacific Panel Products Llc/mount Jewett Mdf | Mount Jewett | PA | Wood Product Manufacturing321219 | — | ◐ LIKELY ACTIVE |
| GMGerome Manufacturing Company | Smithfield | PA | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
Giorgio Foods INC | Reading | PA | Food Manufacturing311412 | 100-499 | ◐ LIKELY ACTIVE |
Girton Manufacturing CO INC | Millville | PA | Machinery Manufacturing333998 | 20-99 | ◐ LIKELY ACTIVE |
| GSGlaxo Smithkline/upper Providence | Collegeville | PA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| GGGlen Gery Corporation Hanley Plant | Summerville | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◐ LIKELY ACTIVE |
Global Advanced Metals Usa/boyertown | Boyertown | PA | Primary Metal Manufacturing331410 | — | ◐ LIKELY ACTIVE |
| GBGold Bond Bldg Prod/milton Plt | New Columbia | PA | Paper Manufacturing322121 | — | ◐ LIKELY ACTIVE |
| GSGoodhart Sons INC. | Lancaster | PA | Primary Metal Manufacturing331111 | 100-499 | ◐ LIKELY ACTIVE |
| GTGordon Terminal Service Co of PA | Mc Kees Rocks | PA | Petroleum and Coal Products Manufacturing324191 | 100-499 | ◐ LIKELY ACTIVE |
| GIGraymont Industries | Pleasant Gap | PA | Nonmetallic Mineral Product Manufacturing327410 | — | ◐ LIKELY ACTIVE |
| GIGrosfillex Inc/lebanon | Lebanon | PA | Furniture and Related Product Manufacturing337125 | 20-99 | ◐ LIKELY ACTIVE |
| GRGrosfillex - Robesonia | Robesonia | PA | Furniture and Related Product Manufacturing337125 | 20-99 | ◐ LIKELY ACTIVE |
G & T Industries | Reading | PA | Plastics and Rubber Products Manufacturing326150 | 20-99 | ◐ LIKELY ACTIVE |
| GBGutchess Brookville | Brookville | PA | Wood Product Manufacturing321113 | 20-99 | ◐ LIKELY ACTIVE |
| GCGuy Chemical CO INC | Somerset | PA | Chemical Manufacturing325199 | 100-499 | ◐ LIKELY ACTIVE |
| HMHamburg Mfg Inc/hamburg Plow Works Plt | Hamburg | PA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| HLHammond Lead Products/pottstown | Pottstown | PA | Chemical Manufacturing325130 | — | ◐ LIKELY ACTIVE |
| HDHardwood Design INC | Bristol | PA | Fabricated Metal Product Manufacturing332216 | — | ◐ LIKELY ACTIVE |
| HMHardy Machine LLC | Hatfield | PA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| HBHaydon Bolts, Inc. | Philadelphia | PA | Fabricated Metal Product Manufacturing332722 | 20-99 | ◐ LIKELY ACTIVE |
| HRHaysite Reinforced Plastics Llc/erie | Erie | PA | Plastics and Rubber Products Manufacturing326121 | — | ◐ LIKELY ACTIVE |
| HLHayward Laboratories, INC. | East Stroudsburg | PA | Chemical Manufacturing325611 | 100-499 | ◐ LIKELY ACTIVE |
Hdz Fab N Design, LLC | Wampum | PA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials US Cement Llc/ Nazareth | Nazareth | PA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| HMHeidleberg Materials US Cement Evansville Plt | Fleetwood | PA | Food Manufacturing311423 | — | ◐ LIKELY ACTIVE |